What is the probability that two squares(smallest dimension) selected randomly from a chess board have only one common corner? Explanation: From the diagram you see that considering the top two rows, there are 14 ways of choosing two squares with just one common corner. Like wise rows (2, 3), (3, 4)…….(7, 8) can be considered. Therefore, number of ways = 14 x 7 = … [Read more...] about GRE Practice: Chess Board Probability

# GRE Probability

## GRE Quant |Probability Maximum & Minimum

A medium difficulty GRE Quant Sample Question in Probability. Ms Li works at an office where the work timing is from 9:00 AM to 6:00 PM. 25% of a year she goes late to office and 35% of a year she leaves early from office. If P is the probability that she works at office the entire day then (a) 0.25 ≤ P ≤ 0.35(b) 0.25 ≤ P ≤ 0.65(c) 0.4 ≤ P ≤ 0.65(d) 0.35 ≤ P ≤ 0.4(e) 0.35 ≤ … [Read more...] about GRE Quant |Probability Maximum & Minimum

## Numeric Entry – Probability, Number Properties

A four-digit number is to be formed with the digits {0, 1, 2, 3, 4, 5} without repetition. What is the probability that this number will leave a remainder 2 when divided by 9? Answer: 0.14 Explanation Required probability = (number of four digit numbers that leave a remainder 2 when divided by 9) / (total number of four digit numbers that can be formed) If a … [Read more...] about Numeric Entry – Probability, Number Properties